Question Paper
Class / Subject: Class 7 (CBSE) · Science
Chapter: Chapter 1 — Chapter 1: The Ever-Evolving World of Science
Time Allowed: 15 minutes
Max Marks: 6
1. Scientific knowledge: [1]
(A) changes and evolves with new evidence
(B) never changes once stated
(C) is always guessed
(D) is based only on old stories
2. Germ theory replaced the earlier belief that diseases were caused by: [1]
(A) bad air
(B) magnets
(C) gravity
(D) sunlight
3. Peer review in science means: [1]
(A) other scientists check and test each other's work
(B) only one scientist decides what is true
(C) ignoring all past research
(D) avoiding experiments
4. A reliable scientific investigation should be: [1]
(A) repeatable and controlled
(B) based on guesses only
(C) never checked again
(D) done just once
5. In a controlled experiment, scientists change: [1]
(A) only one variable at a time
(B) all variables at once
(C) no variables
(D) only the conclusion
6. Repeatability in science means: [1]
(A) other scientists can get similar results from the same experiment
(B) an experiment is done only once
(C) results always differ each time
(D) no one else can check the results